Articles | Volume 16, issue 12
https://doi.org/10.5194/tc-16-4865-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-16-4865-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
06 Dec 2022
Research article |
| 06 Dec 2022
| 06 Dec 2022
The collapse of the Cordilleran–Laurentide ice saddle and early opening of the Mackenzie Valley, Northwest Territories, Canada, constrained by 10Be exposure dating
Department of Physical Geography and Geoecology, Charles University,
Albertov 6, 12843 Prague 2, Czech Republic
Department of Physical Geography and Geoecology, Charles University,
Albertov 6, 12843 Prague 2, Czech Republic
John C. Gosse
Department of Earth and Environmental Sciences, Dalhousie University, 1355 Oxford
Street, Halifax B3H 4R2, Nova Scotia, Canada
Alan J. Hidy
Center for Accelerator Mass Spectrometry, Lawrence Livermore National
Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
Alistair J. Monteath
Department of Earth and Atmospheric Sciences, 1–26 Earth Sciences
Building, University of Alberta, Edmonton T6G 2E3, Alberta, Canada
Joseph M. Young
Department of Earth and Atmospheric Sciences, 1–26 Earth Sciences
Building, University of Alberta, Edmonton T6G 2E3, Alberta, Canada
Niall Gandy
Department of the Natural and Built Environment, Sheffield Hallam
University, Sheffield, S1 1WB, UK
School of Earth and Environment, University of Leeds, Leeds LS2 9JT,
UK
Lauren J. Gregoire
School of Earth and Environment, University of Leeds, Leeds LS2 9JT,
UK
Sophie L. Norris
Department of Geography, David Turpin Building, University of
Victoria, Victoria, V8P 5C2, British Columbia, Canada
Duane Froese
CORRESPONDING AUTHOR
Department of Earth and Atmospheric Sciences, 1–26 Earth Sciences
Building, University of Alberta, Edmonton T6G 2E3, Alberta, Canada
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Cited
10 citations as recorded by crossref.
- Relict permafrost preserves megafauna, insects, pollen, soils and pore-ice isotopes of the mammoth steppe and its collapse in central Yukon A. Monteath et al. 10.1016/j.quascirev.2022.107878
- The glacial geomorphology of the Mackenzie Mountains region, Canada B. Stoker et al. 10.1080/17445647.2023.2203333
- Dynamical response of the southwestern Laurentide Ice Sheet to rapid Bølling–Allerød warming S. Norris et al. 10.5194/tc-18-1533-2024
- Rapid Laurentide Ice Sheet growth preceding the Last Glacial Maximum due to summer snowfall L. Niu et al. 10.1038/s41561-024-01419-z
- Deglaciation of the north American ice sheet complex in calendar years based on a comprehensive database of chronological data: NADI-1 A. Dalton et al. 10.1016/j.quascirev.2023.108345
- Late Pleistocene and Early Holocene Obsidian in Alberta and Human Dispersal into North America’s Ice-Free Corridor T. Kristensen et al. 10.1080/20555563.2023.2243133
- Response of North American ice sheets to the Younger Dryas cold reversal (12.9 to 11.7 ka) A. Dalton et al. 10.1016/j.earscirev.2024.104845
- Ice flow dynamics of the northwestern Laurentide Ice Sheet during the last deglaciation B. Stoker et al. 10.5194/tc-19-869-2025
- Timing of Cordilleran-Laurentide ice-sheet separation: Implications for sea-level rise A. Reyes et al. 10.1016/j.quascirev.2024.108554
- Glacial geomorphology of the northwest Laurentide Ice Sheet on the northern Interior Plains and western Canadian Shield, Canada H. Dulfer et al. 10.1080/17445647.2023.2181714
9 citations as recorded by crossref.
- Relict permafrost preserves megafauna, insects, pollen, soils and pore-ice isotopes of the mammoth steppe and its collapse in central Yukon A. Monteath et al. 10.1016/j.quascirev.2022.107878
- The glacial geomorphology of the Mackenzie Mountains region, Canada B. Stoker et al. 10.1080/17445647.2023.2203333
- Dynamical response of the southwestern Laurentide Ice Sheet to rapid Bølling–Allerød warming S. Norris et al. 10.5194/tc-18-1533-2024
- Rapid Laurentide Ice Sheet growth preceding the Last Glacial Maximum due to summer snowfall L. Niu et al. 10.1038/s41561-024-01419-z
- Deglaciation of the north American ice sheet complex in calendar years based on a comprehensive database of chronological data: NADI-1 A. Dalton et al. 10.1016/j.quascirev.2023.108345
- Late Pleistocene and Early Holocene Obsidian in Alberta and Human Dispersal into North America’s Ice-Free Corridor T. Kristensen et al. 10.1080/20555563.2023.2243133
- Response of North American ice sheets to the Younger Dryas cold reversal (12.9 to 11.7 ka) A. Dalton et al. 10.1016/j.earscirev.2024.104845
- Ice flow dynamics of the northwestern Laurentide Ice Sheet during the last deglaciation B. Stoker et al. 10.5194/tc-19-869-2025
- Timing of Cordilleran-Laurentide ice-sheet separation: Implications for sea-level rise A. Reyes et al. 10.1016/j.quascirev.2024.108554
Latest update: 08 May 2025
Short summary
The Laurentide Ice Sheet was the largest ice sheet to grow and disappear in the Northern Hemisphere during the last glaciation. In northwestern Canada, it covered the Mackenzie Valley, blocking the migration of fauna and early humans between North America and Beringia and altering the drainage systems. We reconstruct the timing of ice sheet retreat in this region and the implications for the migration of early humans into North America, the drainage of glacial lakes, and past sea level rise.
The Laurentide Ice Sheet was the largest ice sheet to grow and disappear in the Northern...
